New York vs Long Island

New York and Long Island both are nouns.

Word	Noun	Adjective	Verb	Adverb
New York	Yes	No	No	No
Long Island	Yes	No	No	No

New York (noun)	Long Island (noun)
a Mid-Atlantic state; one of the original 13 colonies, with capital Albany	an island in southeastern New York; Brooklyn and Queens are on its western end
the largest city in New York State and in the United States; located in southeastern New York at the mouth of the Hudson river; a major financial and cultural center
one of the British colonies that formed the United States, with capital New York City